Improvement in breech-loading ordnance



N} THOMPSON.

lmprovement in Breech-Loading Ordnance.

.NO, 132,220 Patented Oct. 15,187 2.v

- To all ivho'rn it may concern:

the following is a specification:

breech inithe rolling-motion.

block, which in the same' manner as that in my previous U ITED STATE-S PATENT OFFicn.

NATHAN THOMPSON, or BROOKLYN, NEW YonK.

IMPROVEMENTYIN REEcH-LoAmNe ORDNANCEI- Be itknown that LNATHAN Tnorrrsomof the cityof Brooklyn, in Kings county and State of New York,liave-invented an Improvement-in Brccch Loading' Ordnance, of which This invention is an improvement upon an invention for which I made application for Letters Patent 011- the 7th of- March, 1872'; and it consists in forming the rolling breech-block with one side of its collar or guide portion of rectangular forus' so as to give'increased beara ing-surface to resist the shock'offiring, and

as a counter-balance to such angular projec tions Iprovide a solid formation on the reverse of the geared or toothed portion of said breech-block; said breech-block being also formed of spirally wedge-shapejto close the {Referring-to the drawing, Figure 1 represents a horizontal settion in part of the breech-j portion of a piece of ordnance constructed according'to my intention; Fig. vation of the same portion;

2- is a side eleand Fig.3 is a sectiontaken on the line :11 w of Fig. 2, with the breech-block-rolled to its'outer position.

In this instanceI haveshown a method of converting'a muzzle-loading into breech-load ing ordnance, in cases-where the stock in the breech-portion is insuflicient for other modes of alteration by severing the breech-end from the boteorbarrel portion A, and attaching,

,by screw or other similar mechanical device,

the breech-portion B.; 1 Referring to the drawing,-() is the breechs operated in every respect in applicati angular projections g of the rolling plied to this breech-block may Specification forming part of Letters Patent No. 132,220, dated October 15,1872; antedated October 11,1872

on above referred to; its construction,- however, is different, insomuch that one-{halfof the perimeterof that porthgi which traverses the guides is of rectangular form, whilst the other half is circular, and forward 0t this rectangular portion about one third of its 's toothed, asat d, to e in the main; portion or body 713' of the breech', -themremain-' cylindrical periphery gear with the horizontal rack of such cylindrical periphery as a counter-balance to the breech of the ing two-thirds,.f, being solid to act block. The rear portion of that part breech-block which. traverses the ways or guides, being inclined or spiral, act tdcause said breech to close the bore of the 'gunwithoutany separate device to screw it home or to its bearing. The, firing apparatus to-he apbe the same as that described in previous applications filed and allowed. v o 1 1 1 What is here claimed, and desired to be secured by Letters-Patent,is-

1; The. rolling breech-block 0, when o-l"- vid'e'd with a guide-collar of rectangular form on-one-half of its perimeter and cylindricalon the opposite portion, as shown and described; for the purposeset forth.- r

, 2. The rolling brjeech-blochwhen made with a spirally-formed rear portion-to operate as a wedge inclosing the breech, substantially as specified. r a

NAT HAN THOMPSON.

- Witnesses? I SYDNEY E. SMITH, o W. MORRIS. SMITH; 

